首页|南水进京后利用升降轨InSAR解译北京地面沉降发展态势

南水进京后利用升降轨InSAR解译北京地面沉降发展态势

扫码查看
原文链接
  • 万方数据
  • 维普
地下水长期超量开采引发的地面沉降是北京市面临的一个重大问题.中国南水北调中线工程通水极大地缓解了北京市水资源短缺问题.针对南水北调中线工程对北京地面沉降的影响,利用升降轨时序合成孔径雷达干涉测量(in-terferometric synthetic aperture radar,InSAR)分析2015-12-2020-12期间南水北调中线工程通水后北京地面沉降发展态势.研究结果表明,北京市沉降分布不均匀,升轨形变速率及累积形变量最大值分别为-134 mm/a和-697 mm,降轨形变速率及累积形变量最大值分别为-135 mm/a和-734 mm.对比地下水位数据和抗差最小二乘拟合法融合的InSAR形变结果发现,北京地区的沉降速率随着地下水位的上升而逐渐减小,也即南水北调中线工程在一定程度上缓解了北京的地面沉降扩张趋势.
Land Subsidence Situation Interpretation with Ascending and Descending InSAR After the Start of the South to North Water Transfer in Beijing
Objectives:Land subsidence caused by long-term over-exploitation of ground water is one of major problems in Beijing.Since the opening of the South-to-North Water Transfer Project,the problem of water shortage in Beijing has been greatly alleviated,and the pressure of land subsidence has been re-duced to a certain extent.Methods:In order to analyze the development of land subsidence after the start of the South-to-North Water Transfer in Beijing,ascending and descending time-series interferometric syn-thetic aperture radar(InSAR)technique is used to monitor land subsidence in Beijing.First,the mean defor-mation velocity and cumulative deformation in line of sight in Beijing from January 2015 to December 2020 is obtained by the small baseline subset InSAR.Second,the robust least square fitting method is used to fuse the deformation results of the lifting rail,after that the global positioning system monitoring data are compared with the fusion results of lifting rail.Finally,the variation trend between the deformation results obtained by the robust least quadratic fitting and groundwater data is analyzed.Results:The deformation re-sults show that the center of Beijing is basically stable and the deformation distribution is not uniform.The maximum ascending annual deformation velocity and the maximum ascending cumulative deformation amount reach-134 mm/a and-697 mm respectively.The maximum descending annual deformation ve-locity and the maximum descending cumulative deformation amount reach-135 mm/a and-734 mm re-spectively.And the fusion results obtained by the least square fitting method has reliability and accuracy.Conclusions:The subsidence rate in Beijing shows a decreasing trend with the gradual increase of ground-water level.In general,the middle route of South-to-North Water Transfer Project has alleviated the ex-pansion trend of land subsidence in Beijing to a certain extent.

land subsidencetime-series InSARascending and descendingrobust least squares fitting methodSouth-North water transfer

张双成、张雅斐、司锦钊、罗勇、余静、雷坤超、许强

展开 >

长安大学地质工程与测绘学院,陕西 西安,710054

地理信息工程国家重点实验室,陕西 西安,710054

北京市水文地质工程地质大队,北京,100195

中国科学院地质与地球物理研究所,北京,100029

展开 >

地面沉降 时序InSAR 升降轨 抗差最小二乘拟合 南水北调

国家重点研发计划国家自然科学基金地理信息工程国家重点实验室开放课题陕西省自然科学基金

2020YFC151200042074041SKLGIE2019-Z-2-12020JM-227

2024

10.13203/j.whugis20210554

武汉大学学报(信息科学版)
武汉大学

武汉大学学报(信息科学版)

CSTPCD北大核心
影响因子：1.072
ISSN：1671-8860
年,卷(期)：2024.49(8)
  • 14